Recently I have been taught through how to do enhancement for those standard programs. Th reason for doing enhancement is that since we can't directly change the standard code therefore we can add our own functionalities to it.
Before implementing the enhancement code to some standard program(reports, includes, dynpros or enhancements and etc,), please be very clear what the original code was for, or to put it more exactly, we must know what the flow logic the original code was, and what intention was it for, and by which function(code snippet) is the functionality realised. Do know every code snippt in accordance with its functionality and then do enhancement, then we will at least be clear with our own codework, and how to implement it, then even if our code has come into comflict with the original code, we can't directly find the cause, which is of great importance for our development efficiency. So please:Think More, Print Less , I think that's why our motto is Print Less, think more, which must be due to plentiful codework which makes not much sense doesn't contribute to our ability. So it's better to read to enhance our thinking ability.